When comparing Arnold vs Radeon ProRender, the Slant community recommends Radeon ProRender for most people. In the question“What are the best renderers?” Radeon ProRender is ranked 3rd while Arnold is ranked 7th. The most important reason people chose Radeon ProRender is:
Unlike other renderers, Pro Render is capable to using CPU and GPU at the same time, increasing render speed tremendously. Pro Render can also use your system RAM and GPU vRAM at the same time to increasing efficiency in complex scenes.
Ranked in these QuestionsQuestion Ranking
Pros
Pro Wide feature set
Pro Built for production and highly flexible via Open Shading Language
Pro Very fast
Pro Physically based
Arnold is an unbiased Path Tracer.
Pro Can use CPU and GPU at the same time
Unlike other renderers, Pro Render is capable to using CPU and GPU at the same time, increasing render speed tremendously. Pro Render can also use your system RAM and GPU vRAM at the same time to increasing efficiency in complex scenes.
Pro Hardware Agnostic
Runs on AMD, Intel, and NVIDIA so you don't have to worry about it on some hardware.
Pro Free
Radeon Pro Render is free to use.
Pro Final and interactive render denoising
Pro Embree based acceleration
Pro Vega GPU arcitecture support
Cons
Con Expensive
Not a choice for indies.